On the one hand, giving money to congratulate you is a way to express your happiness for your grandson to receive higher education, and it is also an important part of family celebration. This behavior is regarded as a tradition in many families. It can convey expectations and blessings to children, and at the same time show family unity.
On the other hand, whether to give money well depends on the individual's economic situation and willingness. If the economic situation allows, grandparents are willing to give money to Hershey, then this is completely acceptable. However, it is understandable if the economic situation does not allow it, or if individuals are unwilling to give money to Hershey.
Generally speaking, whether to give money to congratulate you or not should be based on family traditions and personal wishes, and should take into account one's own economic situation.